Decisive

De*ci*sive (?), a. [Cf. F. décisif. See Decision.] 1. Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive. "A decisive, irrevocable doom." Bates. "Decisive campaign." Macaulay. "Decisive proof." Hallam.

2. Marked by promptness and decision.

A noble instance of this attribute of the decisive character.
J. Foster.

Syn. -- Decided; positive; conclusive. See Decided.

-- De*ci"sive*ly, adv. -- De*ci"sive*ness, n.